Sharing session across web apps

[Nimmons, Buster]

I have one web-app which gathers a users information and place a userInfo
object in the session. I set the sharing attribute for this and all other
apps to true yet
when I go to another webapp from this one the objects in the session are no
longer there. the session ID between apps is the same but the creation time
and attributes are different. Has anyone succesfully configured webapps to
share sessions